Duodenal ulceration--is endoscopic biopsy necessary?
D000230:Adenocarcinoma / Q000175:diagnosis*; D000368:Aged; D001706:Biopsy; D003937:Diagnosis, Differential; D004381:Duodenal Ulcer / Q000175:diagnosis*; D004384:Duodenoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis*